test safeinterp fails on TCL 8.6

[teclabat]

I get:

==== safeinterp-1.2 Loading into safe interp using package require FAILED
==== Contents of test case:

        $slave eval {
                package require parse_args
                parse_args::parse_args {-test foo-1.2} {
                        -test   {-required}
                }
                set test
        }

---- Test generated error; Return code was: 1
---- Return code should have been one of: 0 2
---- errorInfo: load of binary library for package Parse_args failed: can't use package in a safe in
terpreter: no Parse_args_SafeInit procedure
    invoked from within
"load $libfile [string totitle parse_args]"
    (lambda term "
        dir {
                if {[package vsatisfies [package provide Tcl] 9.0-..." line 7)
    invoked from within

Should it work on TCL 9.0 only?
Else the error message points that there is no Parse_args_SafeInit procedure ...

Environment: Windows, msys2, mingw64